Furnace.



F. J. DOYLE.

FURNAGE.

APPLIUATION FILED JULY 19, 1909.

Patented May 20, 1913.

4 SHEETS-SHEET Illlllllllltlnflik f Illllllllllllvllrrllill F. J. DOYLE.

PURNAGE.

APPLICATION PILBD`JULY 19, 1909.

Bamm-,ed May 20, 1913.

4 SHEETS-SHEET 2,

F. J. DOYLE.

PURNAGE.

APPLIGATION FILED JULY 19, 1909.

Patented May 20, 1913.

4 SHEETS-SHEET 3.

F. J. DOYLE.

FURNAGE. APPLICATION FILED JULY 19, 1909.

y Patented May 20, 1913.

4 SHEETS-SHEET 4.

f STATES PATENT oFFroE.

:annuels J. DoYLE, oFcHIcAGo, ILLINOIS.

FUR'NACE.

' Specification of Letters Patent.

Patented May` 20, 1913.

. Application filed July 19, 1909. Serial No. 508,410.

adapted for heating boiler for the genera@` tion of steam, although capable of use with suitable modifications for hot air heating and the like.

Among the salient objects of the invention are to provide a construction in which the flames of combustion are carried directly into closed lues or combustion chambers `seated in the boilers whereby the water and of combustion is carrled directly into the` boiler chambers; to provide a construction in which the proper supply of air to the combustion chambers is regulated by the heatV of the' flames of combustion themselves; to provide a construction which may be readily adapted for use with either steam, hot water, or hot air heating; to provide a furnace of the above character consisting of a plurality of sectionsof uniform construction, wherebythe size of the furnace may be varied as desired by changing the number ofsections; to provide a construction which'may be readily assembled or disconnected andy which is' particularly adapted for use with portable furnacesand` the like;

1to provide a'simple and '.e'icient construction which can be manufactured ata relatively low cost; and'in general to provide a construction of the'character referred to.

The invention consists .in the mattershereinafter described i and' more particularly pointed out in the appended-claim.

In the drawings-Figure 1 is a perspective view' of my invention with the front part of a furnace shown in section in order to bringout certain details of construction; F1g. 2 1s a horizon-tal sectional view taken shown on an enlarged scale. Fig. 3 is a vertical sectional view taken through one of the intermediate sections. Fig. 4 is a front en'd elevation of the furnace. Fig. 5 is a vertical sectional view of a modified vconstruction. Fig. 6 is a fragmentary horizontal sectional view taken on lines 6--6 -of Fig. 5.

Referring to the dra-wings, 1 and 2 designate as a whole the side walls of the furnace, 3 and 4 the vertical front and rea-r end walls respectively, 5 the b ottom and 6 the top wall. of the furnace. The interior of the furnaceis provided with two longitudinally extending partition walls 7 and'8 4and connecting transverse end walls'9 and 10 which together form the fire box 11. The space between the inner partition walls 7 and 8 and the outer Walls vof the furnace form the boiler spaces 12 and 13 of the furnace. As a feature, of construction, however, each of these boiler spaces is divided intoa plurality of boiler chambers 14 by mea-ns of cross-connecting vertical vpartitions 15 and 16 respectively. Each of the kpartitions is offset at its lower ends as shown at 17, and is provided with opposed vertically Each pair of these channels forms a vertin cally extending combustion chamber 20, the lowerv end of' which communicates with' the tire box by means of ports 21.

At itsupper end the furnace is provided at either side'with a longitudinally extend ing 'ue 22 and an intermediate common exhaust flue 23, the rear end of whichjcommunicates with a'chimney or stack 24. The common exhaust 23 communicates at its front end with the respective fines 22 and the latter are in turn provided with' a series ofl ports, which permit'the gases of combustion to pass outv of the combustion chambers 20 into thelfiues. The lower ends of municate with a common air chamber 25 by means of a series 4of air conduits 26; .there being one for each of the combustion chambers. Each of these air. chambers 25 is closed at its front end by means of any suitable door 27, as shown more clearly in Fig. 4. At either lside of the furnace is suitably mounted a water supply pipe 28, the inlet ends of which communicate with common vsupply pipe 29.

extending channels 18 and 19 respectively.

each series of combustion chambers 20 comapproximately on lines 2, 2` of Fig. 3 but A Each of these pipes 28 are connected to the respective boiler chambers by means of branch pipes 30. Each opposed pair of boiler chambers 14 communicate at its upper ends with a horizontally extending steam passage 32 to each of which -is connected -a branch pipe 33 leading to the main steam pipe 34. The latter is, Iof course, providedwith the usual safety valve 35. It is to be noted that the outermost boiler chambers 14 also communicate at their outer sides with ea'ch other by means of transversely extending passages 31 formed by the end Walls 3 and 4 and .the intermediate partitions 9 and 10. By means of these passages 31 the fire box is entirely surrounded by'the'boiler chambers and accordingly Whatever heat would naturally pass through the end walls of the fire-box passes into the boiler or water box. In order to insure a uniform supply of air to each of the combustion chambers,

- the latter may communicate with each other l shown.

by means of cross conduits or ports 36 as There-box is provided with the usual grate -37 which is spaced above the floor .of

` the furnace a suthcient distance to form the l intothe flues.

As an important featuiie'of the present invention the furnace is composed ofa plu'- rality of intermediate sections 40 and front and rear sections 41and 42 respectively. Each of these sections formsa unitary structure, the walls and partit-ions of which together form the chambers in t-h'emanner heretofore-described. It will be noted that the channeled cross partitions 15 and 16 are provided with iiange like extensions 43 and 44 which are united by means of horizontally extended bolts 45, 45. The outer sections 41and 42 are of a generally similar construction except that the offset portions 14 communicate with each other by means of the transversely extending passages 31 as heretofore described. It is apparent thatany number of intermediate sections may be 'used Without necessitating anychange in the construction of the furnace.

The operation of the furnace may be brieiy described as follows :-As the products of combustion pass through the various ports 21 they will min le with the incom- 1ng air from the condults 26 and will pass up through the combustion chambers 20,

passing thence into the transversely extendlng flues the ames will traverse back and forth as heretofore described and finally pass out through the chimney. Inasmuch as the boiler chambers substantially surround the combustion chambers, it` will be seen that a maximum heating surface is se` cured. At the same timethe construction of the furnace is such that practically all the heated air. It is, of course, necessary that the'cold air supply for the products of combustion does not intermingle with the heated air, and accordingly the rear end of the air chambers|j25 are closed as shown at 25. The upper ends ofthe various hot air chambers communicate with a delivery chamber f 26 Aformed by a hood 28. Suitable pipes 27. convey the heated air from the chamber 26 to thevariou's rooms in the usual manner.-

The invention is not limited to the details ofc'onstruction shown except as set forth in the a pended claim.

' I c aim as my invention:

In a furnace, thefcomb-ination with -a longitudinally extending fire box of substantially the same height as the furnace, a boiler *extending around said fire box, a plurality :of combustion 'chambers extending along either 'side of said fire boxizbetween the latter and the boiler, said co'iibustion chambers terminating at points above the base of the fire box, inlet conduits at the lower end of Asaid combustion chambers, a common air chamber beneath reach row of combustion chambers and communicating with the latter, a pair of ues extending longitudinally of the furnace above the combustion chambers, ai'r conduits extending from said air `chamber to the tops of said.' combustion chambers and to said fines, a common exhaust flue intermediate the other iues and a chimney connected with said latter "liue,;

ports of said `tiues being the inlet and outlet at opposite ends.

FRANCIS J. parte.; Witnesses GEORGE A. MASON, FRAM; L. BELKNAP; 

